Final answer:
The etiologic agents of brucellosis that are important zoonoses are Brucella abortus, Brucella suis, and Brucella canis. Hence the correct answer is option D
Step-by-step explanation:
The correct answer is D. All of the above.
Brucellosis is a zoonotic disease, which means it can be transmitted from animals to humans. The etiologic agents of brucellosis are Brucella abortus (causing brucellosis in cattle), Brucella suis (causing brucellosis in pigs), and Brucella canis (causing brucellosis in dogs). These agents can infect humans when they come into contact with the tissues or body fluids of infected animals, causing symptoms like fever, headache, muscle pain, and fatigue.